Fourths to frank b



(No Model.)

1?; S. GLARKSON.

SASH BALANCE.

N0. 463,285. PatentedNov. 1'7, 1891.

UNITED STATES PATENT OFFICE.

FRANK S. CLARKSON, OF BALTIMORE, MARYLAND, ASSIGNOR OF THREE- FOURTHS TOFRANK l3. SLOAN, OF SAME PLACE.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 463,285, dated November17, 1891.

Application filed June 2, 1891. Serial No. 394,851. (No model.)

To all whom it may concern:

Be it known that I, FRANK S. CLARKSON, of Baltimore, in the State ofMaryland, have invented certain new and useful Improvements inSash-Balances; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame. 7

My invention relates to an improvement in sash-balances; and it consistsin certain novel features of construction and combinations of parts, aswill be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a sectional view through asash and windowframe, showing my improvedbalance in position; and Figs.2, 3, and at are views in detail of various parts of the device.

A represents the usual ribbon or cable to which the sash and weight areattached. This ribbon may be made of steel or any metal used for thispurpose. "When constructed of steel, it is preferably galvanized. Theribbon is applied in the usual way to the sash and sashframe, passingover a pulley 1' and being attached at its ends.

The locking-heads B and C constitute an essential element of my presentinvention, and hence they will be described in this connection, and asthey are, with slight modifications, the same at both ends, it will besufficient to describe one in detail and afterward refer to thedifferences in the other. Head 13 is composed of a key 2 and akey-seat3. The former consists of a block of 'metal around which one end of theribbon is folded. At oppositesides this key is furnished with ears 4. 4,having inclining surfaces 5 5. The key may also be provided with atransverse slot 6, if desired, through which the ribbon might pass iffound expedient.

The key-seat 3 consists of a fiat shank 7, upon the sides of which theears 8 8 are secured or integrally formed. These ears are separatedapart just sufficiently to receive the key between them, and their innersurfaces 9 9 are inclined like the surfaces 5 5 of the key, onlyreversely, so as to fit the latter. The key-seat and ribbon areassembled by slip ping the key into a loop formed in the end of theribbon or by bending the end of the ribbon around it, and then bysliding the key intothe key seat until the reversely-inclined surfaces 55 and 9 9 ride upon each other as far as possible. The tighter theseparts are forced together the tighter they bind the ribbon, and theinclining surfaces are so shaped that application of weight at both endsalways tends to draw the key and key-seat tighter, so that nopossibility'remains of their becoming disassembled. It will be observedthat the head has no perforations and is not secured in place by screwsorv similar means 5 but it is simply sunk into a hole formed for it inthe edge of the sash. The head 0 differs in this respect, merely namely,that the shank of the key-seat is made a little longer, and projections11 ll are formed on its-edges and provided. with holes for the passageof the book 12, which carries the weight 13. The holes in projections 11may, if desired, be omitted. This particular mode of attaching theweight, as well as other features of the invention, could be varied, themain idea being to form the heads so that they will embrace the ends ofthe ribbon rightly and prevent the possibility of the ends slipping fromthem, and I may also add that it is. not absolutely necessary that theloops should be formed in the ends of the ribbon, as it is probable thatthey would be held sufficiently tight without being bent around the key.However, I prefer that the loop should be formed, as that will insureagainst the possibility of the parts becoming accidentally displaced.

Having f nlly described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. Asash-balanceconsisting of a ribbon or cable and heads connected withthe ribbon or cable, said heads composed of sections con structed tointerlock at their side edges and at points outside of the side edges ofthe ribbon or cable, substantially as set forth.

2. In a sash-balance, heads composed of sections flat in their centersto receive a rib- IOO each other as the sections are forced together,whereby. the flat portions are made to approach each other more closely,substantially as set forth.

3. The combination, with a ribbon or cable, of a head composed ofinterlocking sections, one section adapted to have one end of the ribbonor cable Wrapped around it,- the sides of this section Whereon theribbon or cable is wrapped being approximately parallel, sub- 10stantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing Witnesses.

FRANK S. CLARKSON. Witnesses:

TH. KELL BRADFORD, A. W. BRADFORD.

